How many moles are in 7.777x 10^24 molecules of Mg2. Watch your significant
figures
Answers
Answer:
12.91 moles of Mg₂, 8.4x10²⁴ atoms of I.
Explanation:
The number of molecules of any chemical substance is converted to moles using Avogadro's number (That is 6.022x10²³ molecules / mol) :
7.777x10²⁴ molecules * (1mol / 6.022x10²³molecules) =
12.91 moles of Mg₂As you can see, there are 4 significant figures in the number of molecules and the answer of moles.
In the same way, 14 moles of I are:
14 moles I * (6.022x10²³ atoms / mol) =
8.4x10²⁴ atoms of IRelated Questions
WILL GIVE BRAINLIEST
Calculate the number of moles of AL2O3 that are produced when 0.25 moles of fe is produced
2AL(s) + 3FeO(s)-----> 3Fe(s)+ Al2O3(s)
Answers
Compare and contrast a driver of a car and truck, and list defensive driving no links
Answers
Answer:
These defensive driving skills can help you avoid the dangers caused by other ... being aware of the cars around you, checking your mirrors — the list goes on. ... It's not just teen drivers who are at fault: People who have been driving for a while ... car and a slow-moving truck in the same lane, it's a pretty sure bet the driver ...
Explanation:
what type of bonding is occuring in the compound below?
Answers
Answer:
D.Metallic
Explanation:
The metallic model is often characterized as a "sea of electrons". This is because the electrons delocalize from the ion's orbitals, allowing them to roam freely around the substance. This is what the model is showing.
If this helped, a brainliest would be greatly appreciated!
Which is not a critical part of collision theory?
orientation
energy
amplification
collisions
Answers
Answer:
Amplification
Explanation:
I have a question for us gals, is it hard for all of you when you try to get your crushes attention and he/she just keeps ignoring you to the point where you could just give up?
Answers
Answer:
Yes it is hard. For some of us. I already gave up, but now hes coming back. Id say sometimes its useless to get his attention if he never even pays attention to you anyways. It sucks because its so hard to get then to notice you for once.
Explanation:
im struggling and dont want to fail
Answers
Answer: Hey I am sure you will do great just try your best
Explanation:
At equilibrium, the amount of product is equal to amount of reactant
True o False
Answers
Please help me on this!!
Answers
Answer:
OK
Explanation:
OK
Which of the following preparation of salt is incorrect? *
Acid + alkali
Acid + hydrogen
Acid + carbonate
Acid + metal oxide
Answers
Answer:
acid + hydrogen
Explanation:
gives a good combination
WILL GIVE BRANLIEST!! EASY BUT I WAS TO LAZY TO LEARN!! WILL FOREVER BE GREATFUL!!! WILL GIVE BRANLIEST!! EASY BUT I WAS TO LAZY TO LEARN!! WILL FOREVER BE GREATFUL!!!
3. Which side of the chain should you count from when naming organic compounds?
A) Center
B) Right side
C) Side that will give you the longest Carbon chain
D) Left side
4. What is the pH of a solution with a pOH of 10?
A) 6
B) 14
C) 4
D) 10
Answers
Answer:
3. Which side of the chain should you count from when naming organic compounds?
C) Side that will give you the longest Carbon chain
4. What is the pH of a solution with a pOH of 10?
C) 4
pH + pOH = 14
pH + 10 = 14
pH = 14 - 10
pH = 4
-TheUnknownScientist
Which one of your body cells carries proteins that determine your blood type?
1) All of your cells
2)Skin cells
3) Red blood cells
4)White blood cells
Answers
what are 5 reason masks are important for the virus
Answers
They prevent asymptomatic spread. ...
You're protecting others from illness. ...
They're mandated by law in some states. ...
They're good hygiene in general.
Answer:
they reduce viral transmission
They prevent asymptomatic spread
You're protecting others from illness.
They're mandated by law in some states
They're good hygiene in general
answer truthfully:))
Answers
Answer:
b) velocity.
c) velocity, m/s²
d)change in velocity, change in direction, change in both velocity and direction.
e) increasing or decreasing
1. A mixture of 3 gases (A, B, and C) has a total pressure of 240kPa. If the partial pressure of
Gas A is 107 kPa and the partial pressure of Gas B is 55 kPa, what is the partial pressure of
Gas C?
Answers
Answer:
78 kPa
Explanation:
The total pressure is the sum of the partial pressures:
240 = Pa + Pb + Pc
240 = 107 + 55 + Pc
Pc = 78 kPa
Answer:
78 kPa
Explanation:
8. Shanice made a list about alkali metals.
Alkali Metals
Jose one electron
are found in
group one
include elements
Li, Na, and K
ions will have a
negative one
charge
Shanice made a mistake on her list. Which
best describes the mistake Shanice made?
A. Alkali metals do not lose one electron,
they gain one electron
B. Alkali metals are not found in group one;
they are found in group two.
C. Alkali metals do not include elements Li.
Na, and K, they include Al, Si, and P.
D. Alkali metal ions will not have a negative
one charge; they will have a positive one
charge
Answers
Answer:
D. Alkali metal ions will not have a negative one charge; they will have a positive one charge
Explanation:
Alkali metals are a found towards the left hand side of the periodic table. The comprise of Li, Na, K, Rb, Cs and Fr.
They form univalent positive ions such as Cs^+, Na^+ etc. They do not form negative ions but give out one electron to form the sort of ions stated above. Recall that metals are electropositive in nature (donate electrons).
The mistake made by Shanice is to say that group 1 elements have a negative one charge.
0.75 moles of an unknown acid are dissolved in water. If 0.42 moles of H3O+ form, what was the percent dissociation of the unknown acid?
Answers
Answer:
56 %
Explanation:
The percent dissociation of a weak acid can be defined as:
Moles of weak acid that produced H₃O⁺ species / Total number of weak acid moles * 100%
We are given all the required data to calculate the percent dissociation:
0.42 mol / 0.75 mol * 100 % = 56 %
The percent dissociation is 56%.
Compare and contrast the characteristics of acids and bases. Give three
similarities and three differences. use COMPLETE SENTENCES for full points.
*
Answers
Answer:
Acid is a kind of chemical compound that when dissolved in water gives a solution with H+ ion activity more than purified water. A base is an aqueous substance that donates electrons, accept protons or release hydroxide (OH-) ions. An acid is a proton donor. While a base is a proton acceptor.
Explanation:
Hey mate, here's your answer...
What are the protons neutrons and electrons of Vanadium-52 +3 charge
HELP
Answers
Answer:
Protons: 23
Neutrons: 28
Electrons: 23
I THINK
Explanation:
What would happen to an impulse if a neuron cannot produce chemicals at a synapse?
Answers
Answer:
Explanation: he axon releases chemicals called neurotransmitters. Neurotransmitters travel across the synapse between the axon and the dendrite of the next neuron. ... The binding allows the nerve impulse to travel through the receiving neuron
The unbalanced basic equation for the reaction in most airbags is NaN3 --> Na + N2.
A normal airbag needs about 67 liters of Nitrogen gas to fully inflate. (At STP: 1 mole of gas = 22.4 liters of that gas.) How many grams of reactant is needed to produce that amount of gas?
Answers
Answer:52!
Explanation:
Write and balance the following reaction: Hydrogen gas reacts with oxygen gas to form water.
Answers
Answer:
[tex]2H_2 + O_2 -> 2 H_2 O[/tex]
Which compound is produced by a neutralization?
H2O(l)
HNO3(aq)
H3PO4(aq)
Ca(OH)2(s)
Answers
Explanation:
HNO3(aq) is the compound produced by a neutralization
5. (10 Points) To calculate the heat released in the reaction you used the formula
q=cmAT. What do each of the symbols represent in the this formula?
Answers
Explanation:
To calculate the heat released in the reaction, we use the formula-
Q = m×c×Δt
Where
Q - The heat energy
m - the mass of the object/substance being heated
c - the specific heat of the object/substance being heated
Δt - the change in temperature in °C
Organisms that need nitrogen to survive are
all living organisms.
only animals.
only bacteria.
only plants.
Answers
Answer:
Correct option is
A) all living organisms
animal,plant,bacteria somehow everybody is dependent on nitrogen same as oxygen!
Water cannot dissolve all substances that are made from ionic bonds. This is probably because
A.
Water needs to be stirred to dissolve all ionic substances
B.
Some ionic bonds are too strong for the attractions of water molecules to pull them apart
C.
Some water molecules are not as strong as others
Answers
Water cannot dissolve all substances that are made from ionic bonds probably because some ionic bonds are too strong for the attractions of water molecules to pull them apart.
WATER AS A UNIVERSAL SOLVENT:Water is a unique molecule often referred to as a universal solvent because it can dissolve almost all solutes. Water is capable of dissolving polar substances i.e. substances that have an unequal distribution of positive and negative ions.However, some ionic bonds formed from ions of elements are unable to be dissolved by water and this is probably attributed to the fact that those bonds are too strong to be pulled apart by water molecules.
Learn more about at ionic compounds at: https://brainly.com/question/9167977
Which of the following actions decreases the entropy of a system?
A-mixing baking soda and salt
b- freezing water
c- dissolving salt in water
d-boiling water
Answers
Answer:
b- freezing water
Explanation:
Solid<liquid<gas is the general rule for entropy increase
Freezing water would change the phase from liquid to solid which would lead to less entropy
Which two compounds of oxygen are small molecules?
Explain why metals conduct electricity. Refer to structure and bonding in your answer
Answers
Answer:
They are electrical conductors because their delocalised electrons carry electrical charge through the metal.
Explanation:
for the second ques
not sure...
Matches=from Chemical energy to light energy+heat energy
Answers
Explanation:
A matchstick has a lot of chemical energy stored in it. When the match is struck, it burns and the chemical energy in it produces heat energy and light energy.
brainliest and follow and thanks
Which of the following diatomic gases has the shortest bond between its two atoms?
A. HI
B. O2
C. CI2
D. N2
Answers
The first asteroid to be discovered is Ceres. It is the largest and most massive asteroid is
our solar system’s asteroid belt, having an estimated mass of 3.0 x 1021 kg and an orbital
speed of 17900 m/s. Determine the amount of kinetic energy possessed by Ceres.
Answers
Answer:
kinetic energy possessed by Ceres = 4.806 × 10^(29) J
Explanation:
We are given;
Estimated mass; m = 3 × 10^(21) kg
Orbital speed; v = 17900 m/s
Formula for kinetic energy is;
K.E = ½mv²
K.E = ½ × 3 × 10^(21) × 17900²
K.E = 4.806 × 10^(29) J
Thus;
kinetic energy possessed by Ceres = 4.806 × 10^(29) J